Meiosis - Biology - Socratic
In meiosis II anaphase we have two cells, each containing 23 chromosomes. After they split, the chromosomes come apart into 23 chromatids in each cell. How do these chromatids replicate themselves into 23 chromosomes if they have crossed-over their genes?
What are the steps involved in meiosis? - Socratic
2015年7月19日 · In meiosis I there is prophase I, metaphase I, anaphase I, and telophase I and then in meiosis II there is prophase II, metaphase II, anaphase II, and telophase II. - In meiosis I we have; Prophase I in which a pair of homologous chromosomes line up and form a tetrad. This is the stage during which genetic recombination occurs.
What happens to chromosomes in meiosis 1 and meiosis 2?
2016年1月30日 · In Meiosis 1, chromatin condenses to chromosomes,they ... How many chromosomes are present in telophase ii?
What is the difference between meiosis II and mitosis?
2018年2月9日 · Meiosis II produces 4 haploid cells, whereas mitosis produces 2 diploid cells. Meiosis II is a continuation of Meiosis I. In Meiosis I, two cells are produced which then go into Meiosis II and further divide into 4 cells. Meiosis is also a process of forming the ''sex cells'' aka. sperm and egg.
What is the difference between meiosis 2 and mitosis?
2018年6月25日 · The major difference between meiosis II and mitosis is the ploidy of the starting cell. Meiosis II begins with two haploid cells, which have half the number of chromosomes as somatic cells. This is because they will develop into gametes. Mitosis begins with a diploid cell. It will divide into two sister cells, both of which are also diploid.
What is the end result of meiosis? How many cells will there
2018年2月26日 · As a result of meiosis four cells are formed in the end and all the four cells are different from one another. Meiosis occurs in 2 stages : Meiosis-I and Meiosis-II. In meiosis-I , paring of homologous chromosomes occurs. The genetic material is doubled during prophase I stage. After pairing of homologous chromosomes, crossing over occurs resulting in the …
How does meiosis contribute to genetic variation in a speciation?
2017年5月19日 · Meiosis is recognized as a process that contributes to genetic variation. Here's a brief overview: There are two divisions that occur during the entire process of meiosis, ending in haploid cells. You start with a diploid (2n) cell, and end with 4 (n) haploids. There are two phases, Meiosis I and Meiosis II. The genetic variation part: During Prophase I of Meiosis I, a unique …
How do the products of meiosis I differ from those of meiosis II?
2018年4月4日 · Meiosis one results in 2 haploid cells (duplicated), meanwhile meiosis two results in 4 haploid cells that are not doubled. Basically, what this means is, in meiosis I, the process is to separate homologous chromosomes, meanwhile in meiosis II, the process is …
Why is there no interphase between Meiosis I and Meiosis II?
2017年4月4日 · First thing to remember is that interphase is a stage associated with replication of DNA, and growth. Once meiosis starts, the purpose is to produce a haploid gamete. So there is no further need of replication or growth. Hence between meiosis I …
What are the number of (human) chromosomes in each stage of …
2016年8月16日 · Meiosis is divided in M I and M II. In the beginning of M I, one germ mother cell has 46 chromosomes, and at the end of M II, each of the generated four gametes will possess only 23 chromosomes. Before meiosis starts, the mother cell has the complete 2n set that is, 23 pair/46 chromosomes in its nucleus : Each chromosome is represented twice in the full set (as …